He graduated from the University of Illinois School of Dentistry in 1978 and served 3 years in the United States Navy Dental Corp as a dental dentist. He made his decision to specialize in periodontics while he was in the Navy and came to Louisiana State University School of Dentistry in 1981 to accomplish this goal. Dr. Mabry is a member of the New Orleans Dental Association, the Louisiana Dental Association, and the American Academy of Periodontology. Additionally, Dr. Mabry is a Fellow in the International Congress of Oral Implantology, a Fellow in the American College of Dentists, a gratis facility member of the LSU School of Dentistry's Department of Periodontics, and a member of the Academy of Dentistry International. The emphasis of Dr. Mabry's periodontal practice is dental implants and laser dentistry. In 2002, he founded and currently directs the Lake Pontchartrain chapter of the Seattle Study Club. The primary goal of the study club is to provide continuing education for the immediate dental community. Dr. Mabry is married to Charlotte Connick Mabry and he has two children, Joanne and Katherine.